Barrel-stave-sawing machine.



PATENTED DEC, 15, 1903.

s. LOVELAND. BARREL STAVE SAWING MACHINE.

APPLICATION FILED APR. 1. 1902.

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UNITED STATES Patented I December 15, 1903.

PATENT OFFICE;

BAXTER D. WHITNEY, OF WINCHENDON, MASSACHUSETTS.

BARREL-STAVE-2SAWI'NG MACH|NE.

Sll?EGIFICAILION forming part of Letters Patent No. 746 719, dated December 15, 1903.

Application filed April 1, 1902. Serial n. 100,9 7, unmade.)

To all whom it may concern:

Be it known that I, BYRON S. LOVELAND, a citizen of the United States, residing at Winchendon, in the county of Worcester and Commonwealth of Massachusetts, have invented a new and useful Improvement in Barrel-Stave-Sawing Machines, of which the following is a specification, accompanied by.

drawings forming a part of the same, in which- Figure 1 represents a perspective. view. of

a portion of a barrel-stave-sawing machine.

Fig. 2 is a perspective view of that part of the machine which embodies my present vinvention and relates to the mechanism for controlling and adjusting the position of the have shown so much of a harrel-stave-sawing machine as is necessary to illustrate the na ture of my present invention and its method of operation.

The object of my present invention is to provide means by which the attendant is enabled to radially adjust the guide plate against which the block to be sawed rests for the purpose of determining the thickness of the stave and to shift its position instantly without interfering with the operation of the machine; and it consists in the construction and arrangement of parts, as hereinafter described and set forth in the annexed claims.

The barrel-stave machine embodying my invention and represented in part in Fig. 1 of the accompanying drawings is similar in its construction and operation to the barrelstave machines now in use, and it comprises a supporting-frameworkin which is jonrnaled thickness of the stave.

is moved against the saw, it rests against the surface of a guide-plate, the space between the revolving plane of the saw and the plane.

of the surface of the guide-plate determining the thickness of the stave to be sawed. The guide-plate is held upon a sliding plate, sliding in ways in the framework of the machine and provided with means by which the surface of the guide-plate can be adjusted relatively to the plane of the saw in order to determine the thickness of the sawed stave.

Referring to the accompanying drawings, A denotes a portion of the supporting-frame- .work; B, the barrel-saw; 0, one end of the rev ciprocating carriage capable of sliding along a track D in a line'parallel with the axis of the revolving barrel-saw B. The carriage is provided with the usual clamping-dogs E E, between which the block is held.

F denotes the guide-plate, provided with a block-supporting surface G, upon which the block to be sawed rests as it is moved along against the cutting edge of the barrel-saw B. The guide-plate F is provided with a slot F and is adjust-ably attached by bolts H H passing through the slot F to the end of a sliding plate I, sliding in ways on the frame of the machine, in order to vary the distance be-.

tween theplane ot the supporting-surface G of the guide-plate and the plane of the revolving barrel-saw, therebydetermining the p The sliding movement of the plate I and attached guide-plate F is accomplished by means of a handle J on the end of a latch-bar K, pivotally connected to the upper end of a lever L, which is pivoted-near its lower end upon a stud M, projecting from the side of the sliding plate I and having its lower end pivotally connected by a linkrN with a stud O, projecting from the side of a fixed bracket P. The latch-bar K has asliding motion in a mortise Q, supported upon the upper end of a bracket R, attached to the framework of the machine, said mortise Q forming a guide for the sliding latch-bar K and also permitting a slight rising-and-falling motion'of the latch-bar within the mortise Q. The latchbar K is provided with a shoulder S, adaptedto engage one of a series of stops by which the position of the sliding plate I and guide-plate F is determined. In the present instance three stops are shown, T, T, and T The stops T, T, and T consist of bars heldin and capable of sliding in Ways in the bracket R in position to engage the shoulder S on the latchbar K. The stops T, T, and T consist of straight bars one placed above the other, the bar T sliding in ways in the bracket R and the bar T resting upon and sliding over the bar T The stop T is bent at its forward end at right angles, its bent end extending over the stops T T and beneath the latch-bar K. The stops T, T, and T are adjusted in the bracket R by means of adjusting-screws U, U, and U held in the bracket and bearing against the rear ends of the stops T, T, and T By means of the adjusting-screws U, U, and U the position of the steps can be very nicely and accurately adjusted to regulate the thickness of the sawed stave, the three stops providing three separate adjustments of the guide-plate, thereby permitting staves of two thicknesses to be sawed with the third adjustment to provide for a heavier cut or slab to be taken from the side of the block. My improved device for adjusting the position of the guide-block enables the adjustment to be made by the attendant from one stop to the other by an instantaneous movement of the latch-bar K Without interfering with the operation of the machine. This is a great advantage in the operation of the machine, asit enables the block to be sawed to be instantly shifted when the carriage is run back, so as to change from a thick to a thin stave, or vice versa, according to the character of the Wood to be sawed, without delaying the forward movement of the carriage. For example, the stop T can be set in proper position by its adjusting-screw U so that when the shoulder S of the latch-bar K rests against it the supporting-surface G of the guide-plate F will be in proper position to saw a thin stave. Wheneverin the operation of sawing the character of the wood block is such, by reasonof season checks, knots, or cross-grain, as to unfit it for a thin stave, the latch-bar K is lifted and its shoulder brought against the next stop T, thereby setting the guide-plate in position for a thick stave. In case large knots or other defects are encountered the latchbar K can be brought against the upper stop '1, thereby cutting a slab or thick stave from the block.

It will be noted that my improved device for controlling the position of the guide-plate F is not only capable of instantaneous adjustment from one to the other of the several positions named, but each of these adjustments is capable of an independent and fine adjustment by means of the adj usting-screws U, U, and U The instantaneous and independent adjustments of the guide-plate are all accomplished by the attendant from a convenient position at the side of the'machine by means of the latch-bar K, which is supported upon the bracket R in an elevated position, with its free end provided with a bandle J, extending toward oneside of the machine in position to be conveniently operated by the attendant having charge of the sliding carriage 0, upon which the bracket is supported.

Pivoted upon a stud and at the upper end of the bracket R is a cam-lever W, arranged to bear against the upper surface of the latchbar K and hold it from being accidentally lifted whenever the latch-bar K has been permanently set upon one of the stops T, T, and T The mortise Q is high enough to allow the latch-bar to be lifted so its shoulder will clear the upper stop, and thereby allow the guide-plate to be moved farther from the saw than would be permitted by the stops. In the operation of the machine the cam-lever W serves to shorten the mortise and prevent the latch-bar K from being accidentally lifted too high to engage one of the adjustable stops. Whenever it is desired to drop the guideplate a greater distance than the adjustable stops will allow, the cam-lever W is raised to clear the latch-bar and allow it to be lifted above the adjustable stops and permit it to slide through the mortise Q.

What I claim as my invention, and desire to'secure by Letters Patent, is

1. In a barrel-sawing machine, the combination of a sliding plate having a guide-plate attached thereto, a lever-handle operatively connected with said sliding plate, a latch-bar pivotally connected to the end of said lever, a mortised bracket supporting said latch-bar, sliding bars held in said bracket and arranged to engage said latch-bar, and means for adjusting said sliding bars, substantially as described.

2. The combination with the guide-plate of a barrel-sawing machine, of a latch-bar operatively connected with said guide-plate and having a handle by which the guide-plate is moved, a fixed bracket, sliding bars held in said bracket in position to engage said latch-bar, substantially as described.

3. The combination with the adjustable guide-plate of a barrel-sawing machine, of a latch-bar operatively connected with said guide-bar and having a pivotal connection at one end and provided with a shoulder to engage a retaining-stop, a fixed bracket, a series of adjustable stop-bars held in said bracket, and means for the longitudinal adjustment of said bars, substantially as described.

4:. The combination with the guide-bar of engagement with said stop-bar, substantially a barrel-sawing machine, of a pivoted latehas described. y 10 bar eperatively connected with said guide- Dated this 22d day of March, 1902. bar, a fixed bracket a. sliding bar held in 5 said bracket and ar ranged't-o engage said BYRON LOYELAND 1310117133! and serve as a, stop, means for ad- Witnesses: justing said stopbar and a cam-lever by RUFUS B. FOWLER,

which said latch-bar is held in permanent 'M. M. SGHUERMANN. 

